Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b29bef82625b027453944a2cd131bbde08af35ada5e0c687020d2618c1cd7705' 
  AND token = 'Q4L42nW6acRqzIoW3TeyG1dNr2wcPhPGVb+ssqhsV0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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