Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3a0d013413ed4ecc9c36e1959def008224848daa251437b98f432679c6f71d3' 
  AND token = 'VreE3UhGyystlzauumEqxWW2E0SupS6eSP34beH1bFk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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