Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffa57b5c35fe9a9e4172e83dca660d68c86853389e497951caa9be12988f13d9' 
  AND token = 'WlUAz5RLjohHKdGwHmsxNioqXOTwEHy999b7X2cTgtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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