Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fcd5a4fa25f61a9de45b44c880b10f3192d78918dd6114db4b2aad15274ef851' 
  AND token = 'uSw8ietf0xd/I1jMehUGUtEfEHuCG0COGQy4G858mx0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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