Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd09a2aea688daa4c1b77ca0b77338385fbf6748aa2260c253dacc6cdbc81d2aa' 
  AND token = 'MleJr7tAICGVPqjQT3jFsyItBX24R5DvS2BLlWni2cA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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