SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd191c763584a7e86fc4f612781953d61e50771715458628258e0701997fc092c' 
  AND token = 'XLbINHFnhAQI/hOBgvKsrNu3YwvwjMalcytsT+m9oxo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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