Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a676d14389bd06f85e9601111a4f591262078664cee44869d61fdc7845439415' 
  AND token = 'H5bFg7OiSPKKt2J32EAUGP6ak1ZUnb+cUDO09AyjKyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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