Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5f09ab935940a9d617abc2223dc38606b7bc2425b3376d7ab74299d3f1b3b92' 
  AND token = 'St8jTPdDmaj1Eo7OjupnejPD4YGkfT1KKkQn6UGMZsc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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