Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faeca5647802377a423656457ae3d6b020458259c1abdb1c6ecd9931805c1fb7' 
  AND token = 'eIxerOv7+lgiE7yqUe4ejKoCMMEqvEkdfpjR7xtoBAs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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