Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccf8bf4211065f7bfc354ceac84b63bf0b1782a6017e143824a24e84b82fe520' 
  AND token = 's5oTZOh89o/RRlgwA6UtijQBhKtKdR9vsTMd7SzEw1w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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