Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ac19eff3a80d3db71fdb7c22a75a786ae8a0666cf2ac9b8f780fe3589f1e772' 
  AND token = 'kT5GljO7892sQ8jZRfgyyJ9kpkTFmiKf7/4EEHSXUbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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