Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '25f4f9bda6897059fe449169dcf3914f03a62ea89a33bf414d892e866608fcb5' 
  AND token = 'b3+ueHBSfPqM7Ga0PLG2y5Vrlh28ToA5tWp5AmuJZAY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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