Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd8678f6027f62b2cb73be0ca4671be9427ac30f7635a4b97d859530cf6d00d6' 
  AND token = 'P91E+zNcONRpDpEEGy9lzUq72Y4+Pv250Jg8Y6+io18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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