Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd8877993d0178721b9269116c60d626e37b11c58ad26f83c24294f09b04ad4d6' 
  AND token = 'uIQ8hTOnRaDnsFYZy3fM9ehbWl0EFIs1iRABaaO2G94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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