Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd20632e400678575f2e234b9a73464b6762b495cade391bc0386660dc4e8bc17' 
  AND token = 'ksj1qwczEMMDFWjKfJP5Ef6nKmq9vPCoEzs6rU+IDxU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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