Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79f4e63c39ff40c8500bb17e99b9736eda4ffc1ea2ac8021361bade1913ab874' 
  AND token = '1XA43lWwlc2aSzshmqgvNWTZeAkY2lcUhcoinDCTFYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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