Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6247028d5d6ac6e49d459324ee5bd74095a1937fe4ce7bb7a0f3ed7676471b7' 
  AND token = 'ZKtyFPjdg2YFRjMYgfVgMKcie0uEnR0jvdigzTwZAJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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