Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8856ada1fb6b856bc3e0b6eeb398a2d7bd21e87d01cc18d4473cce8a2e2e1b79' 
  AND token = 'XNTBzXZ2NpXOx9jefe7NJNUEGxImQROpHxNu5vOEBmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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