Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a13aa05c58c2a9ff3d622f4ecc2f0cb78a66078d9323d951b8092a37c8a455a2' 
  AND token = '39LOOVnu3HP4LuHpvsshw+TwlTuffJmIDDsnN4Elq7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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