Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5121686c356f52d07b1f92b2c98c7e2cbc72ae1b2de3963259642165ce8e165a' 
  AND token = 'jpXIquV4c21c1kqccLKANOiik3SSwRXrsAr+CMYzae4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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