Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2fc341d0eea4fbe62f8b9626795956b7105252d52110fb23250b638a185b30e' 
  AND token = '+sAuEenT+8MRfg58ve+EWkTPmyoMBt6n+nGwpbbO0L8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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