SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ad37a23aff9f220981ac3fd59e2a163b24d76d33ac67d478664b7512e10aec7' 
  AND token = 'vvZ7+4JiiGYZZwa4J5wkK2p5T609SZPojXrAljFOYAw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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