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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2eaa716a14f4543135774ac2da9915ba7bc079947cd874d9ac1f37657db77dd' 
  AND token = '37rd/i97NvqBGCJzUPILjvOxE3t/u2IxhrPnwVqpWcs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}