Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30455c1532abb03321b66383055dcc1ef0086ff13233c2cefa5701e29a2ce3f0' 
  AND token = '7jFrah1UufOO5qJ4XyjMzC36c9FfRgOg5kiGgwp6gIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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