Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '36788190d76f836b0473b374dd072e2c54d2c9e38792fa2a9222e99117fd4536' 
  AND token = '6/Ewk9iCxDe08hjygKllC2oA3GCJMi44eNRMn5YANO8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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