Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab12e42a1a516347e648cb60018634595665a304e9ab98b985f80eb4a85f83b1' 
  AND token = 'F3BAZA2nFOkKborl8RLZvLrq/phNJeet3ug/4vtAmQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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