Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a753fa17e93bdfdff401e0275d1de77f6a296e9573f4c06f5f20606f925df62' 
  AND token = 'KWAPSwLr0Ny//0+MZTbkmwLpZgj0Zu4zxJ3JRU/IWMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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