SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1a90f80235c90490816a93766d5e6ddbe447dcffc6a87b1e89c639e24507032d' 
  AND token = 'hhburoY/4k/7CTrKp+LMrz+TJ2gmjbjnIrbdy4rPk9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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