Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '39037b7736146a620c5d1c937d4eaff785849fd04a357b4ec4a4ff40437feb63' 
  AND token = 'XXpta/UMunB1cdaFlEzN09KlIjopiuONi7ZjrU6qXSU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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