Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd1edd14a6d54800c7b441babe9addeef12aa84c2d1a22a2ef6d1e1711c5c633' 
  AND token = 'J/yMRE819X6Y75tfQlwNTBhEEN4Q9At4l/OGxYZV6No=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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