Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4406d7a399118ffd216ac5c12057cfef257e098613e52319224be5232c070b78' 
  AND token = 'BWWZ9Hdo/56coR03O8aAYLeKGfArT6fAmlRXxLlRc2o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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