Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c859da0bcbb00aac11e36caf491448a6029a2f9f09c3da8a0c58a27d36196fd2' 
  AND token = 'S89VfYGTnbDfuAm6f3ENfQpFHIX7QZKdDVgD8kO8F7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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