Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59c0e9d045757fa9ad30177d609362d133b10287028349f311cb37275ef2bedb' 
  AND token = 'uWk361PObOsarvE7DaLyLJziLxKgpsqymzoMllrfORU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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