Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '191b953032c934ca7be86e84bb493450ea545accec805de8d43c9cd07b853225' 
  AND token = 'brivTmQRB1bmGtudltoO/EdmpvczJdafmOoOBkqD83s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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