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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b99610883afbfb96b07be9e8096162cc430c2b50355464e2fbeb6fce0c5005bb' 
  AND token = '+tTEyMRGHqxl1HrMdADgRM5j/cjJtjgXGGPeIeW07rI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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