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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcc8db756aedcb1058b5144b0bacbeaa6b969691b26e447e677482af9ffcc5d9' 
  AND token = 'i+HB77NCgZaYQTtRY5xmXJJFjpbRCaARYWMYNGXCDHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}