Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3d5823db5a5f6aab749b143cdba728337c7608e9cf367f07a16e0fb9eb6ad624' 
  AND token = '97UqbtHiR+42RrWZvXkqyIcr5rWotL2yZDKIR4Om/Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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