Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5f70c9eb48f9ea2b5a6e22d99a60d71a5a3eeb72ee782830d81a8f2e91d76a77' 
  AND token = 'wC1dul6fLi8fEw9NcskVFQWlGS/y1IIN14Op1K2Eum0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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