Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c4dff6f4cf08ec51f7cbb4c375db6f293ba7a29e39a21e4b92da133315b07ee' 
  AND token = 'z1RYBSCzD7MD/oA1q2fG3K0fskVK3uorspqA3dz7VzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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