Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4618892e3382d31c79d4282756d1d4b67361776567459a72229c71f9287e079e' 
  AND token = 'H4ej8Dhs4DhhRhbOXeNnuls1junUcRPbYn620y16hUE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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