Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8508f67613dca53c02359165907158a444d4bea148a86a19fc0bc9ec267b5300' 
  AND token = 'edCbvu6rTS5zW0EwErw3AgEKhm7/2Ocf8Y1RHKYHyDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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