Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11d3de93754533de6182c30fe48c6b2f2aeab9756322f210d9eca621abdbc940' 
  AND token = 'lUyjTWkInSCmRsSkK9Ri7pgAnbj/NFqdx3HhHSDQgMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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