Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55d6cc834f0a8216883c09e76390e39fe40bd1874aa8824dfc12f9287e2739da' 
  AND token = 'vwplvqtYO1IkYxtw3pQ2K1frCGls1dnzoTYdFY7SpLM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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