Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4431d5c42a6a51a79ee5570bfb3d18b79e320fd539de1a3d835329348ae3a921' 
  AND token = 'JCr4O3q1mMyKpbKgY/QiSSj33cxA+/lcSy0AeGhbbEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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