Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39ba0c88be378cc51f0328746272c26589ce2346faffbab2cbaf7b7799f53044' 
  AND token = 'LR4sb9JMyVPfrTHSzVkS4Iy9TtaqdhCHE1PUH1mxrco=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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