Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2646cd339f530c8997533768ce7f8616d40b168f4d2e68f25dcb8f64e77ee462' 
  AND token = '+m7qEgP+4gwnOT/qzrENFGYiAYs7pfN/i22d676i8pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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