Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b85053307393bb1bee29daa5b509ab5df33866e2815f489fe5d53171c18b642a' 
  AND token = 'Xlix3RtjFNfARB6BTU+oAOBLrnb5ZimISURGOniLfUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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