Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f359280a1172bf46bf52ebe3504186746d3c195ba209998c4b2082aaa8402a3a' 
  AND token = 'D6xrZV4raMyTM0JAcaB8XA4HrjhycOoVmVAKYgzesWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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