Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ea624e6fd3222ec162220a594c7f40c5a97acfc9f05be1fcb9e096329c10152' 
  AND token = '5UnqxABE6RGQ3VZdND9GAUqrLKa1SrC9iZuyF82R4y4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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