Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af5232b2f4be5c2eec0dd1f51a1f1bfbddd251f3183f1d3cf88aee49bce81e7b' 
  AND token = 'qjzCrC9ZPkS39ig2ClIN0/MLcBrEZeoF0EKmDveQXNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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