Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcff469830b5d7efd9ec3c342a852c3e05f8a3a1bf9b0dafdab3d00b16731711' 
  AND token = 'CLLrFN18HkmZwGIWaY+pMOd34DnMK3LtSvXCK1wpeqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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