Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e46af99db747bb94ea853e0218534a78a7319150ad11ddd973b28178ad2c759' 
  AND token = 'AU5fGDO826peHicGA+b0Q8qekoKPDrZctFIZTcIaz5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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