SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5f4984636ebd69fcb903fea087635253a485041a5e09dc14026880ba7025737' 
  AND token = 'iQIS2n4Ys4l+UJsxhpcAzXY5ijvAq/7pl2kB2rH9PEE=' 
  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"
    }
  }
}