Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '027e02c63fe6c9a1ef9c4949c33ac311f30faaa5d762d75430901174d1343b14' 
  AND token = 'l8lkEbSkhgnPv44NvrnvOsWShHIxUWZpi4uTy6rvL7g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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