Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a068c80a73c0c54c81994c333c83b247788806c97c472cc6c375ea53454fcb58' 
  AND token = 'eBSZgRyPH6ZMYWLduhaQXgTo3ffrxfUXSsZqnYfTCMQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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