Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3adc55fbb46973c6c15c041e55e40707c343a50a8f3d3f93332b2f0eeffb76d8' 
  AND token = 'ia+LneNoJdToDmViCNrPtCkBCNYfqMHpLFV/Blc31Yk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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