Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3743eaf9e97a6fb16e4f9535212d15492eeb3a32d2b029c6e23b172ff4792377' 
  AND token = 'g90x0P//BlTZDCXlkyspCFsL88hlCabN0RECyO81JTQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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