Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9a9e91d7e6df0dc3d0b5639290c46ca51aef2def86e9034e7948231ba1b6569' 
  AND token = 'HsGU2p3oli6KAQeArdJ6PjRBJKgcfnTyc5A2FcyXACU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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