Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f02dbd11a95e04e505ceb542a59ec3c978fa716eb5db536447da44de8a955cc' 
  AND token = 'KH7m9roiitAoKS88CS2R3l3f+dyiqJ37MpPQaaP9iuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}