Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05bfc3d8ffee6f974cea9ae99e61318bf7b3bb07eb7ec83f84e7e8c05a31dd05' 
  AND token = 'OVz9Wvq1XPzvxofPTxwhcVdcW9Gq1GCX3DCnDMck8VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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