Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da600bc985843116d906395e2ce22048403ab63a1f4e5975d50a4550cee965f1' 
  AND token = 'DT3pNjOp41xnOg3MZu/j5+ttpoolmLZRJKitkvyrpSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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