Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6addd36425751988629d4dcfc5ae5031908eb414f0b9b56aa489820b66af424' 
  AND token = 'hX7QOnB0psf8h3bMcC8orZobleqqrOWv2ZXHlJt81Is=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

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