Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97273f7a06f8cea153f31edea98caa9f05792a683760cae560255223cc31242d' 
  AND token = 'c504FBDH4pcsbUeuA+uN2APk8FLdSHK0RL4vjECAoGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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