Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32518d0fbcfee618f871695a0b2e22c576be6d25af54fd1fd8fc4ea054d9b348' 
  AND token = 'kS39JQeSPaSED7Tn1bf/sMglirmgQT80SK+cMKS7WjE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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