Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '85e236933f0076e0c9b69d8e09b6ac8ccd811fa6ea5e53bc2d506898f7e7b3d1' 
  AND token = 'pm1nd9bMUhhbDGKtBUBQI4yIXqe+LiJCpZXDfkTPbb4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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