Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0fd8c81b9388a0b7bfef32fdf133904488bbc63188076d2a5b67236e3718650' 
  AND token = 'elwPYpNrzQAM7Sze4KcVU5FN5fYZGVQjbPuADPsoO5o=' 
  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"
    }
  }
}