Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f398c3c01e1f0a9d627658d097d0c67ad444801793066385f19bede9060dc280' 
  AND token = 'cD3KBtoZWaW18sCbThKLMIYuQhYX9GgCCbw+VLEH6ao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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