Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c824eca3b1d4657abdd2ffeb0c5093d89163cc4f225d8d2e3dc733e718e9bf3' 
  AND token = '2MWhEvak+fpT6QDQigrhVRM7MP10vFdepdlj2FzNgPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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